MANN51
MANN51 is a Texas oil lease in Upton County, Railroad Commission district 7C, operated by Cog Operating LLC. It has 2 wellbores on file with the Commission. Reported production runs from October 2010 to August 2026, totalling 53,374 barrels. The lease is currently producing. Fitting a decline curve to that history and pricing the remaining production at today's forward curve values the whole lease — a 100% undivided interest — at about $207K, with roughly $35K expected over the next twelve months. An individual royalty owner receives their own decimal interest times that figure. Over the last twelve months on file it averaged 32 barrels a month, about 16 per wellbore. Its strongest month on the record we hold was December 2016, at 407 barrels. In our own backtest, leases producing at this rate are forecast to within about 45% of what they went on to produce, and that measured error is the range shown on the page rather than a confidence of our own devising.
Key facts about MANN51
- Who operates MANN51?
- MANN51 is operated by Cog Operating LLC, Railroad Commission of Texas operator number 166150.
- Where is MANN51?
- MANN51 is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 17400.
- Is MANN51 still producing?
- MANN51 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for MANN51 is August 2026.
- How much has MANN51 produced?
- MANN51 has reported 53,374 barrels of oil (bbl) to the Railroad Commission of Texas between October 2010 and August 2026, from 2 wellbores.
- How much is MANN51 worth?
- The remaining production from MANN51 is estimated to be worth about $207K in total as of 26 August 2026, within a range of $114K to $301K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in MANN51 is a fraction of it. The estimate fits an Arps decline curve to the production MANN51 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for MANN51 is an estimate of value, not an offer and not an appraisal.
- How much income does MANN51 generate in a year?
- MANN51 is forecast to net about $35K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in MANN51 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Cog Operating LLC |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Upton County, Texas |
| RRC district | 7C |
| Lease number | 17400 |
| Wellbores | 2 |
| Reported production | 53,374 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $207K |
Where MANN51 sits
Source: Railroad Commission of Texas lease production records, complete through . Figures on this page were computed on .
Production figures are as reported to the Railroad Commission of Texas. The value shown is an estimate produced by fitting a decline curve to that reported history; it is not an offer or an appraisal. How this estimate is calculated.